package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import com.sky.mapper.SetmealMapper;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 * 自定义切面类，实现公共字段自动填充
 */
@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    private final SetmealMapper setmealMapper;

    public AutoFillAspect(SetmealMapper setmealMapper) {
        this.setmealMapper = setmealMapper;
    }

    //切入点
    @Pointcut("execution( * com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void AutoFillPointCut(){}

    //切面方法,进行公共字段的赋值
    @Before("AutoFillPointCut()")
    public void autoFill(JoinPoint joinPoint){
        log.info("自动填充公共字段");
        //获取当前被拦截方法上面的数据库操作类型
        MethodSignature signature =(MethodSignature)  joinPoint.getSignature();//获取对象签名
        Method method = signature.getMethod();//获取方法上的注解对象
        AutoFill annotatedReturnType = method.getAnnotation(AutoFill.class);
        OperationType value = annotatedReturnType.value();//获得数据库操作类型
       //获取当前被拦截方法的参数--实体对象
        Object[] args = joinPoint.getArgs();

        Object entity = args[0];
        //准备赋值数据
        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();
        //根据数据库操作类型，对实体对象进行赋值
        if (value == OperationType.INSERT){
            try {
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreatUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setCreatUser.invoke(entity, currentId);
                setCreateTime.invoke(entity,now);
                setUpdateUser.invoke(entity, currentId);
                setUpdateTime.invoke(entity,now );
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        } else if (value== OperationType.UPDATE) {
            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setUpdateUser.invoke(entity, currentId);
                setUpdateTime.invoke(entity,now );
            } catch (Exception e) {
                throw new RuntimeException(e);
            }

        }
    }
}
